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251 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) An anonymous seventh grader once said "I noticed that 251, 521, and 2521 - 1 are all prime. Why don't you try 512 * 2512 - 1 or something?"
Submitted: 1999-09-11 19:03:51; Last Modified: 2008-01-30 11:28:00.
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